Band-severing knife.



No. 789,128. PATENTED MAY 2, 1905. W. DOUGLASS.

BAND SEVERING KNIFE.

APPLICIATION FILED MAY 28, 1904. RENEWED APR. 10. 1905.

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No. 789,123. PATENTED MAY 2, 1905 W. DOUGLASS.

BAND SBVERING KNIFE.

APPLICATION FILED MAY 28, 1904. Rmmwnn APR. 10. 1905.

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Allorney Patented May 2, 19.05.

PATENT OFFICE.

WILLIAM DOUGLASS, OF PHILLIPSBURG, KANSAS.

BAND-SEVERING KNIFE.

SPECIFICATION forming part of Letters Patent No. 789,123, dated May 2, 1905.

Original application filed Tune 14, 1902, Serial No. 111,721. Divided and this application filed May 28, 1904. Renewed April 10, 1905. Serial No. 254,800.

T0 on whom it may concern:

Be it known that I, WILLIAM DOUGLASS, a

citizen of the United States, residing at Phil- 1902, Serial No. 111,7 21, in which application the severing mechanism which forms the subject of the present case is shown and described in connection with a self-binder harvester. While the cutting apparatus forming the subject-matter of the present case is primarily intended for and particularly adapted to the severing of a continuously-moving straw band for binding sheaves in self-binder harvesters of the type shown in my application aforesaid, yet it is adapted also for use in connection with self-bind er harvesters of types other than that shown in my said application, and, in fact, capable of use wherever it is desired to sever a continuouslymoving band into lengths.

Briefly stated, my invention comprises a spring-actuated knife-carrier provided with a pivoted cutting-blade, said carrier and blade being adapted to be reciprocated at regular intervals so as to project the knife across the opening in a bed-plate, through which opening the continuously-moving band passes, the

knife during its cutting thrusts being held in position to span the opening and sever the band, but during its retraction being depressed below the opening, so as not to strike or interfere with the movement of the band therethrough.

In order that my invention may be more clearly understood by those skilled in the art, I have illustrated one embodiment of the same in the accompanying drawings, in which Figure 1 is a view of so much of a harvester-frame as will serve to illustrate the manner of mounting and operating the bandsevering knife. Fig. 2 is a view in elevation, on an enlarged scale, of the bed-plate, the knife-carrier, and knife detached from the harvester-frame. Figs. 3, 4, and 5 are detail views of the knife and knife-carrier.

Referring to the drawings by letters, like letters indicating like parts in the several views, I denotes the framework on which the knife and its parts are supported.

Mounted in suitable supports 6 is a sliding band-severing knife consisting of a plate a, sliding freely in the support a and being provided with a spring 7;" which imparts the cutting thrust to said knife. Said plate '6 carries at its forward end the severing-knife '6 having a serrated cutting-blade. Said knife 6 is pivoted, as shown in Fig. 5, at the forward end of the plate i said plate having connected therewith, by means of a link t, a knife-retracting and spring-compressed lever a, by means of which the knife i is retracted and the spring 6 is put under tension, said lever 2' having at its other end a roller 2' (see Fig. 1,) which roller is to be engaged by any suitable operating device, such as a cam or similar element driven from the main shaft of the machine or any other suitable source of power, to impart to said lever its knife-retracting and spring-compressing movements at regular intervals. The said severing-knife is provided at its point with a lug a, which normally bears against the under side of the ledge r formed on a plate 71 said plate being provided with an opening through which the straw band passes, and it will be seen that the severing-knife i crosses said opening in the plate 2' with a shearing cut. After making this severing cut the knife i is depressed and passes back to its normal position beneath the band-opening in the plate by means of a pivoted spring-held plate 2', pivoted on the plate 6 as shown in Fig. 2, the lug 2' depressing the plate a in its forward movement, but on its return movement riding along the lower inclined edge of the plate 6 and passing back to its original position, so that the knife 6 will clear the continuouslymoving band on its return movement, the spring 2' throwing the knife 2' back to its normal position after it has made its return movement.

From the foregoing it will be seen that I have provided a band-severing knife which is adapted to sever a continuously-moving band into lengths in a rapid and effective manner, and while I have shown and described a particular construction of band severing mechanism 1 do not wish to be understood as limiting myself to any of the details shown and described,except so far as I am limited by the terms of the appended claims.

What I claim is 1. Band-severing mechanism comprising a reciprocating severing-knife, means for holding said knife during its forward movement in position to make a cutting thrust across the path of the band, and means for moving said knife from such cutting position and out of the path of the hand during its return movement.

2. Band-severing mechanism, comprising a reciprocating severing knife, a spring for holding said knife at a cutting angle to the hand during its forward thrust, and means for depressing said knife below the band during its return movement.

3. Band-severing mechanism comprising a reciprocating knife-bar, means for giving a cutting thrust to said bar, independent means for retracting said bar, a severing-knife pivoted at the forward end of said bar, means for holding said pivoted knife in cutting position relative to said hand during its cutting thrust, and means for moving said knife from such cutting position during its return movement.

4. Band-severing mechanism comprising a reciprocating knife-bar, a spring for giving a cutting thrust to said bar, independent means for retracting said bar and compressing said spring, a severing-knife pivoted at the forward end of said bar, means for holding said pivoted knife in cutting position relative to the band during its cutting thrust, and means for moving said knife from such cutting position during its return movement.

5. Band-severing mechanism comprising a reciprocating knife-bar, a spring for giving a cutting thrust to said knife-bar, means for retracting said knife-bar and compressing said spring, a severing-knife pivoted at the forward end of said bar, and a spring for maintaining said blade at a cutting angle to the band.

6. Band-severing mechanism comprising a reciprocating knife-bar, aspring for giving a cutting thrust to said knife-bar, means for retracting said knife-bar and compressing said spring, a severing-knife pivoted at the forward end of said bar, a spring for maintaining said blade at a cutting angle to the band,

and means for depressing said blade below the band during the retraction of the knife-bar.

7. Means for severing a continuously-moving band comprising a bed-plate having a bandopening therein, a reciprocating knife, means for impelling said knife across the bed-plate opening with a cutting thrust, means for retracting the knife, and means for depressing said knife below the moving band during such retraction.

8. Means for severing a continuously-moving band comprising abed-plate having a bandopening therein, an inclined reciprocating knife, means for impelling said knife across the bed-plate opening with a cutting thrust, means for retracting the knife, and means for depressing said knife below the moving band during such retraction.

9. Means for severing a continuously-moving band comprising a bed-plate havinga bandopening therein, an inclined reciprocating knife, a spring for maintaining said knife in inclined position, means for impelling said knife across the bed-plate opening with a cutting thrust, means for retracting the knife, and means for depressing said spring-supported knife below the moving band during such retraction.

10. Means for severing a continuously-moving band comprising a bed-plate having a bandopening therein, an inclined reciprocating knife, a spring for maintaining said knife in inclined position, means for impelling said knife across the bed-plate opening with a cutting thrust, means for retracting the knife, and means on said bed-plate for depressing said spring-supported knife below the moving hand during such retraction.

11. Means for severing a continuously-moving band comprising a bed-plate having a bandopening therein, a pivoted knife, means for moving said knife across the band-opening to make a severing cut, means for retracting said knife, and a guide on said bed-plate to depress said pivoted knife below said opening during its return movement.

12. Means for severing acontinuously-moving band comprising a bed-plate having a bandopening therein, an inclined pivoted knife, means for moving said knife across the bandopening to make a severing cut, means for re tracting said knife, and a guide on said bedplate to depress said pivoted knife below said opening during its return movement.

13. Means for severinga continuously-moving band, comprisinga bed-plate havinga handopening therein, a pivoted knife, means for reciprocating said knife, a guide to hold said pivoted knife in cutting position during the forward movement of the knife, and a guide to depress said pivoted knife below said bedplate opening during the retraction of the knife.

14;. Means for severing a continuously-moving band comprising a bed-plate having abandopening therein, a pivoted knife, a spring for maintaining said knife in cutting position, means for reciprocating said knife, a guide on said bed-plate to hold said pivoted knife in cutting position during the forward movement of the knife, and a guide on said bedplate to depress said pivoted blade below said bed-plate opening during the retraction of the knife.

In testimony whereof I afliX my signature in presence of two witnesses.

WILLIAM DOUGLASS.

Witnesses:

HENRY CALVER, A. V. CUsHMAN. 

